48 psl 5 uzd

#include <iostream>
#include <math.h>

using namespace std;

int main()
{
    double n = 75;
    while (n>0){
        n=sqrt(n);
        n=floor(n);
        n=n*n;
        cout << n << ", " << endl;
        break;
    }
    return 0;
}